IOM 2020, Блиц — Задача 61
The Blitz-contest of IOM-2020
Условие
Consider squares lined up in a row. Each square is colored in either red, blue or green so that each square has at least adjacent square of the same color. How many ways are there to color the squares?
Отговори
- 413
Решение
Внимание: Непълно решение
The source contains only the answer key, no worked solution.
Answer: 413
Оригинал в Архива: iom-2020-blitz-tasks.pdf · официални решения: iom-2020-blitz-answers.pdf